Foldable narrow space construction hoist

Abstract

This invention relates to a foldable hoisting device for construction in confined spaces, particularly in the field of building construction. It includes a protective base with guardrails on three sides. Two symmetrically arranged guardrails are rotatably connected to the base, while a third guardrail is slidably connected. Hooks are located at the four corners of the top of the base. A receiving plate is installed inside the base, slidably connected to the base. A transmission mechanism drives the receiving plate to extend out of the base. After the user climbs the ladder, they step on the lifting frame, causing it to descend. A transmission mechanism automatically unfolds the three guardrails, surrounding the three sides of the base. Simultaneously, a threaded rod, a gear, and a rack mechanism automatically extend an inclined plate, allowing it to contact debris on the wall and prevent it from falling to the ground.

Description

Technical Field

[0001] This invention relates to the field of building construction, and particularly to a foldable hoisting tool for construction in confined spaces. Background Technology

[0002] In the construction industry, especially in interior decoration projects, working at heights is a very common scenario. Tasks such as wall painting, wall sanding, and ceiling inspection all require workers to operate at heights. To ensure the safety of workers at heights, various types of construction hoisting equipment are typically used. These hoisting devices are primarily used to protect and secure workers at heights, preventing falls and are indispensable safety equipment in indoor construction at heights.

[0003] However, when performing wall painting and sanding work at heights indoors, a large amount of construction waste is generated, mainly including dust, paint chips, and wall debris. Because the work area is at a height, this waste falls directly downwards under gravity, scattering onto the indoor floor, the surfaces of finished components, or the construction equipment. Currently, the protective equipment used for indoor work at heights, whether traditional construction hoists or conventional guardrails, focuses primarily on personnel safety, providing only support and fall protection for workers, but lacking the function of blocking or collecting construction waste.

[0004] The aforementioned issue of falling debris has brought numerous inconveniences and potential hazards to the construction process: On the one hand, the scattered construction debris requires specialized personnel to clean it up later, which not only increases the workload of construction workers and prolongs the construction period but also raises construction costs; on the other hand, the falling dust will pollute the indoor environment, affecting the workers' visibility and health, while hard debris such as paint chips and wall slag may damage completed decorations such as floor paving and doors and windows, causing rework and further increasing construction costs and time pressure.

[0005] Furthermore, interior decoration work often faces the challenge of limited space, especially in small apartments, corridors, and bathrooms. Conventional protective equipment and waste collection devices are bulky and difficult to arrange flexibly. They not only occupy limited construction space and affect the operational flexibility of workers, but may also interfere with existing interior components, failing to meet the needs of construction in confined spaces. At the same time, existing construction hoists are mostly fixed structures without folding capabilities, making them difficult to store and transport after construction. They also occupy considerable space when stored, hindering standardized management of the construction site.

[0006] In summary, existing construction hoisting equipment used in indoor high-altitude operations in building engineering only provides personnel protection and cannot solve the problem of waste falling and being collected during high-altitude operations. Furthermore, it suffers from drawbacks such as large size, non-foldability, and poor adaptability, making it difficult to meet the actual needs of interior decoration work in confined spaces. Therefore, designing a construction hoisting equipment with both personnel protection and waste collection functions to address the shortcomings of existing technologies has become an urgent technical problem to be solved in the current construction industry. Summary of the Invention

[0007] To address the aforementioned technical deficiencies, this invention provides a foldable hoisting tool for construction in confined spaces. The technical implementation of this invention includes a protective base with guardrails on three sides. Two symmetrically arranged guardrails are rotatably connected to the protective base, and a third guardrail is slidably connected to the protective base. Hooks are respectively installed at the four corners of the top of the protective base. A receiving plate is installed inside the protective base and is slidably connected to the protective base. A transmission mechanism drives the receiving plate to extend out of the protective base.

[0008] More preferably, it also includes a gear, which is fixed to the guardrail and meshes with a rack. A rotating plate is rotatably connected to the top of the guardrail.

[0009] More preferably, a lifting frame is installed on the protective seat, the lifting frame and the protective seat are slidably connected, the lifting frame and the rack are fixedly connected, the bottom of the lifting frame is in close contact with the side of the rotating plate away from the guardrail, and a return spring is connected between the upper part of the lifting frame and the protective seat.

[0010] More preferably, the transmission mechanism includes symmetrically arranged threaded rods, which are mounted on the receiving plate. The threaded rods and the receiving plate are threadedly connected, and the threaded rods and the protective seat are rotatably connected. A second gear is fixedly connected to the side of the threaded rod away from the receiving plate. The second gear meshes with a second rack, which is fixedly connected to the guardrail on the side away from the receiving plate.

[0011] More preferably, a sliding frame is provided at the top of the protective seat, the sliding frame and the protective seat are slidably connected, a wedge block is provided on the sliding frame, an inclined surface is provided on the lifting frame, the inclined surface cooperates with the wedge block, and a limiting spring is wound on the sliding frame.

[0012] More preferably, the top surface of the receiving plate is provided with an inclined plate through a shaft, the thickness of the inclined plate is the same as the thickness of the cavity provided on the top surface of the receiving plate, the inside of the receiving plate is a hollow structure and is slidably connected with a movable plate, a compression spring is connected between the movable plate and the receiving plate, an inclined block is fixedly connected to the top surface of the movable plate at the opposite end, the inclined block and the inclined plate are pressed together, and a discharge port is opened on the side of the receiving plate that is close to each other.

[0013] More preferably, the bag vacuum cleaner is fixed inside the lower part of the protective seat, the bag vacuum cleaner is provided with a connecting shell, the top of the connecting shell is fixedly connected to the protective seat, the protective seat has a connecting port on the side near the connecting shell, the connecting port is connected to the discharge port, and dust collection shells are provided on the other three sides of the protective seat, the dust collection shells are fixedly connected to the protective seat, and the dust collection shells are connected to the bag vacuum cleaner.

[0014] More preferably, the inclined plate has a hollow internal structure, and water outlets are opened at equal intervals on the top of the inclined plate. The inclined plate is connected to a connecting pipe, which is connected to an external water pipe.

[0015] More preferably, a cylinder is provided at the bottom of the protective seat, and a lifting frame is fixedly connected between the bottom of the cylinder's telescopic rod. The lifting frame and the protective seat are slidably connected, and the lifting frame is equipped with casters.

[0016] More preferably, the ladder consists of a fixed ladder and a rotating ladder. The two fixed ladders are fixedly connected to the bottom of the protective base, and the rotating ladder is rotatably connected to the bottom of the fixed ladder. A torsion spring connects the rotating ladder and the fixed ladder. A compression wheel is rotatably connected to the lifting frame near the rotating ladder. The compression wheel and the rotating ladder are in compression engagement. The bag vacuum cleaner, the gravity block and the lifting frame are in compression engagement.

[0017] Compared with the prior art, the present invention has the following advantages: After the user climbs the ladder, the user steps on the lifting frame, causing the lifting frame to move down. Through the transmission component, the three guardrails can automatically unfold to surround the three sides of the protective seat. At the same time, through the threaded rod, gear two and rack two components, the inclined plate can automatically extend, thus contacting the wall debris and preventing the wall debris from falling to the ground.

[0018] This invention extends the receiving plate and the inclined plate and the inclined block at the same time. After the inclined block contacts the wall, the inclined plate and the inclined block press together, so that the inclined plate automatically rotates and tilts to guide the wall debris to slide down and be collected. In addition, after connecting the external water pipe and the connecting pipe, the water can automatically wash the debris on the inclined plate. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention.

[0021] Figure 3 This is a partial three-dimensional structural cross-sectional view of the present invention.

[0022] Figure 4 This is a diagram showing the separated state of the protective base, the receiving plate, and the movable plate of the present invention.

[0023] Figure 5This is a three-dimensional structural diagram of the components of the present invention, including the connecting shell, dust collection shell, and cylinder.

[0024] Figure 6 For the present invention Figure 4 A schematic diagram of the three-dimensional structure at point A in the middle.

[0025] Figure 7 For the present invention Figure 1 A schematic diagram of the three-dimensional structure at point B.

[0026] The above-mentioned attached drawings include the following reference numerals: 1. Protective seat; 1010. Hook; 101. Guardrail; 102. Gear 1; 103. Rack 1; 104. Lifting frame; 105. Rotating plate; 106. Return spring; 2. Support plate; 201. Ladder; 2010. Fixed ladder; 2011. Rotating ladder; 2012. Torsion spring; 2013. Compression wheel; 202. Threaded rod; 203. Gear 2; 2 04. Rack and pinion 2, 205. Sliding frame, 206. Wedge block, 207. Restricting spring, 3. Moving plate, 301. Compression spring, 302. Inclined plate, 303. Inclined block, 304. Discharge port, 5. Bag vacuum cleaner, 501. Connecting shell, 502. Connecting port, 503. Dust collection shell, 504. Water outlet, 505. Connecting pipe, 6. Cylinder, 601. Lifting frame, 602. Casters, 7. Gravity block. Detailed Implementation

[0027] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.

[0028] Example 1: A foldable hoisting tool for construction in confined spaces, see attached document. Figures 1-2 The device includes a protective base 1, with protective railings 101 on three sides. Two of the symmetrically arranged protective railings 101 are rotatably connected to the top of the protective base 1, and the other protective railing 101 is slidably connected to the protective base 1. The structure of the protective railings 101 is existing technology and will not be described in this embodiment. Ladders 201 are provided on both sides of the protective base 1, allowing users to climb to the top of the protective base 1. Hooks 1010 are provided at the four corners of the top of the protective base 1, allowing chains to be hooked onto the hooks 1010. The entire lifting device can be lifted by the chains and hooks 1010, enabling workers to perform high-altitude operations.

[0029] Existing technologies typically consist of a raised platform base and a railing mounted on it. When using these technologies to paint or sand walls at heights, users usually place the platform base at a certain distance from the wall. During the work, debris generated can fall directly to the ground through the gap between the platform base and the wall, causing ground pollution. To prevent debris from falling directly to the ground, the platform base can be placed close to the wall, allowing debris to fall onto the platform base, but this adds the step of cleaning the platform base. This embodiment proposes a solution to intercept and collect wall debris, simplifying the wall cleaning process. The specific solution is as follows:

[0030] Reference Appendix Figure 3 The protective seat 1 is equipped with a receiving plate 2, which is slidably connected to the protective seat 1. After the user climbs onto the protective seat 1, the receiving plate 2 can be extended by the transmission mechanism so that it extends and is tightly attached to the wall to catch the wall debris, thus preventing the debris from falling directly to the ground.

[0031] Initially, refer to the appendix. Figure 1 , Figure 2 and Figure 3 The three guardrails 101 are folded to reduce the size of the device. After the user climbs onto the protective seat 1, the three guardrails 101 need to be unfolded to surround the protective seat 1. Therefore, a mechanism is provided on the protective seat 1 that can simultaneously rotate and unfold two guardrails 101 and slide and raise the other guardrail 101. The mechanism includes a transmission component, which is set on the guardrail 101 and consists of a gear 102 and a rack 103. The gear 102 is fixed on the guardrail 101 and meshes with the rack 103. A rotating plate 105 is rotatably connected to the top of the protective seat 1. By simultaneously pressing down the rack 103 and squeezing the rotating plate 105 away from the guardrail 101, the gear 102 and the guardrail 101 connected to it can be rotated 90 degrees, and the raised guardrail 101 is raised.

[0032] To simultaneously drive the rack 103 and the rotating plate 105, a lifting frame 104 is installed in the middle of the protective seat 1. The lifting frame 104 and the protective seat 1 are slidably connected, and the lifting frame 104 and the rack 103 are fixedly connected. The bottom of the lifting frame 104 is in close contact with the side of the rotating plate 105 away from the guardrail 101. A return spring 106 is connected between the upper part of the lifting frame 104 and the protective seat 1. The return spring 106 drives the lifting frame 104 to remain in an upward state through its elastic force. After the user steps onto the protective seat 12, the return spring 106 is compressed by stepping on the lifting frame 104, causing the lifting frame 104 to press down and drive the rack 103 to press down. At the same time, the rotating plate 105 is squeezed to the side away from the guardrail 101. In this way, the three guardrails 101 can be unfolded to surround the protective seat 1, and the open side of the protective seat 1 is used by the user for construction on the wall.

[0033] As mentioned above, the extension of the receiving plate 2 is driven by a transmission mechanism. To improve the practicality of the equipment, this embodiment considers that the guardrail 101 on the side away from the receiving plate 2 will rise and fall. Therefore, the lifting power of the guardrail 101 on the side away from the receiving plate 2 is linked to the transmission mechanism. The purpose is that when the guardrail 101 rises, it drives the receiving plate 2 to extend through the transmission mechanism, and when the guardrail 101 falls, it drives the receiving plate 2 to retract through the transmission mechanism. The specific implementation plan is as follows:

[0034] Reference Appendix Figure 3 The transmission mechanism includes symmetrically arranged threaded rods 202, which are mounted on the receiving plate 2 and are threadedly connected to the receiving plate 2. The threaded rods 202 are also rotatably connected to the protective seat 1. A gear 203 is fixedly connected to the side of the threaded rods 202 away from the receiving plate 2. The gear 203 meshes with a rack 204, which is fixedly connected to the guardrail 101 on the side away from the receiving plate 2. When the guardrail 101 rises, it will drive the rack 204 on it to move upward. The rack 204 then drives the threaded rods 202 to rotate through the gear 203. The rotation of the threaded rods 202 will cause the receiving plate 2 to automatically extend out of the protective seat 1.

[0035] In summary, when the user foot-operated lifting frame 104 descends, the transmission component and the rotating plate 105 drive the guardrail 101 to move synchronously to surround the three sides of the protective seat 1. At the same time, the transmission mechanism causes the receiving plate 2 to extend. Thus, when the user foot-operated lifting frame 104, the receiving plate 2 automatically extends and the guardrail 101 automatically rotates. This achieves two functions with one action, improving the practicality of the invention.

[0036] However, after the user presses down the foot-operated lifting frame 104, it cannot remain pressed down continuously when starting work. If the user releases the lifting frame 104, it will rise and return to its original position due to the elastic force of the return spring 106. This, in turn, causes the guardrails 101 on both sides to rotate and return to their original position via the transmission components. The lifting guardrails 101, on the other hand, will descend and return to their original position due to their own weight. This will affect the user's work. Therefore, a locking function for the lifting frame 104 is implemented, as detailed below:

[0037] Reference Appendix Figure 2 The protective seat 1 has a sliding frame 205 at its top, which is slidably connected to the protective seat 1. A wedge-shaped block 206 is provided on the sliding frame 205. The lifting frame 104 has an inclined surface that engages with the wedge-shaped block 206. A limiting spring 207 is wound around the sliding frame 205. One end of the limiting spring 207 is fixedly connected to the wedge-shaped block 206, and the other end is fixedly connected to the protective seat 1. During the descent of the lifting frame 104, when the inclined surface of the lifting frame 104 contacts the wedge-shaped surface of the wedge-shaped block 206, it will push the wedge-shaped block 206 apart, causing the sliding frame 205 to move as well. When spring 207 is compressed, the inclined surface on the lifting frame 104 separates from the wedge-shaped surface of wedge block 206. Then, spring 207 will cause wedge block 206 to reset. At this time, the flat bottom surface of wedge block 206 will hold the lifting frame 104 in place, so the lifting frame 104 cannot move upward. Even if the user releases the lifting frame 104, the lifting frame 104 will not reset due to the spring, so it will not affect the user's operation. After using the equipment, the user can manually pull sliding frame 205 to release wedge block 206 from the lifting frame 104. In this way, the lifting frame 104 will rise automatically, and guardrail 101 and receiving plate 2 will reset.

[0038] Example 2: Based on Example 1, refer to Appendix Figure 4 After wall debris falls onto the receiving plate 2, the debris needs to be automatically collected. An inclined plate 302 is provided on the top surface of the receiving plate 2 via a shaft. The thickness of the inclined plate 302 is the same as the thickness of the concave cavity on the top surface of the receiving plate 2. The purpose is that the inclined plate 302 can be placed flat on the concave cavity on the top surface of the receiving plate 2 and can be retracted into the protective seat 1, thereby reducing the size of the device and saving the floor space occupied by the device when it is not in use.

[0039] The receiving plate 2 has a hollow structure inside, and a movable plate 3 is slidably connected inside the receiving plate 2. When the movable plate 3 slides between the receiving plate 2 and the receiving plate 2, the inside of the receiving plate 2 is not sealed, and the gas can be communicated, which avoids the problem that the movable plate 3 and the receiving plate 2 cannot slide against each other. A compression spring 301 is connected between the movable plate 3 and the receiving plate 2. The compression spring 301 is located inside the receiving plate 2. An inclined block 303 is welded to the top surface of the opposite end of the movable plate 3. The inclined surface of the inclined block 303 faces the platform of the protective seat 1 and forms a pressing fit with the opposite end face of the inclined plate 302.

[0040] As the receiving plates 2 extend away from each other, they simultaneously drive the moving plate 3 on them to move as well. After the outer end face of the moving plate 3 contacts the wall, the moving plate 3 and the inclined block 303 automatically stop. At this time, the receiving plate 2 continues to drive the inclined plate 302 away from each other due to pneumatic movement. After the inclined plate 302 and the inclined block 303 are squeezed, they automatically rotate 0-30 degrees around the axis as the rotation point. When the ends of the inclined plates 302 that are away from each other are in contact with the top of the inclined block 303, the inclined plate 302 and the receiving plate 2 form a 30-degree angle. The wall debris received by the inclined plate 302 will slide down due to the inclined surface. The discharge port 304 is opened on the side of the receiving plates 2 that are close to each other. The wall debris will slide down through the discharge port 304. Users can place a trash can under the discharge port 304 to collect the debris. The wall debris is small debris produced by wall grinding. The size of the discharge port 304 is set according to the volume of the wall debris.

[0041] Conversely, after the receiving plates 2 approach and retract, the moving plate 3 on them will also be reset. After the inclined plate 302 separates from the inclined block 303, the inclined plate 302 will swing downwards and reset due to its own weight, and will retract into the protective seat 1 along with the receiving plates 2.

[0042] Referring to attachment 5, in order to enhance the garbage collection function, this embodiment proposes the following solution: the bag vacuum cleaner 5 is fixed inside the lower part of the protective seat 1, and the bottom of the bag vacuum cleaner 5 is suspended from the ground to avoid wear and tear between the bag vacuum cleaner 5 and the ground. The bag vacuum cleaner 5 is provided with a connecting shell 501, the top of the connecting shell 501 is fixedly connected to the protective seat 1, and the protective seat 1 has a connecting port 502 on the side near the connecting shell 501, which is connected to the discharge port 304.

[0043] After the receiving plate 2 extends, the connecting port 502 connects with the discharge port 304. In order to better collect construction waste into the bag vacuum cleaner 5, by turning on the bag vacuum cleaner 5, the bag vacuum cleaner 5 can draw the wall waste into the bag vacuum cleaner 5 through the connecting port 502, the discharge port 304 and the connecting shell 501, which can prevent the waste from falling into a position outside the bag vacuum cleaner 5. The bag vacuum cleaner 5 is existing technology, and this solution will not elaborate further.

[0044] Since a lot of fine dust may be dispersed into the air around this device when sanding the wall, in order to collect the dust, dust collection shells 503 are installed on the other three sides of the protective base 1. The dust collection shells 503 are fixedly connected to the protective base 1 and are connected to the bag vacuum cleaner 5. When the bag vacuum cleaner 5 is turned on, the dust collection shells 503 will draw the dust around the device into the bag vacuum cleaner 5, thus reducing the spread of dust into the air.

[0045] Reference Appendix Figure 4 and Figure 6 When debris falls onto the inclined plate 302, it may float on the inclined plate 302 and fail to fall off. Therefore, this embodiment proposes the following solution: The inclined plate 302 has a hollow internal structure, and water outlets 504 are opened at equal intervals on the top of the inclined plate 302. The inclined plate 302 is connected to a connecting pipe 505, which is connected to an external water pipe. Water can enter the inclined plate 302 through the connecting pipe 505 and spray out from the water outlets 504, thus washing away the debris on the inclined plate 302.

[0046] Because this device is relatively large, it would be inconvenient for users to carry it around. Therefore, this embodiment proposes the following solution:

[0047] Reference Appendix Figure 5 The lower part of the protective seat 1 is provided with symmetrically arranged cylinders 6. The bottom of the telescopic rod of the cylinder 6 is fixedly connected to the lifting frame 601. The lifting frame 601 and the protective seat 1 are slidably connected. The lifting frame 601 is provided with casters 602.

[0048] When not in use, the lifting frame 601 and casters 602 can be raised by retracting the telescopic rod of cylinder 6, so that the lifting frame 601 can be retracted and the lifting device can be folded for easy carrying. When the lifting device is needed, the lifting frame 601 and casters 602 can be moved downward and reset by extending the telescopic rod of cylinder 6.

[0049] Additionally, please refer to the appendix. Figure 1 and Figure 7 The ladder 201 is composed of a fixed ladder 2010 and a rotating ladder 2011. The two fixed ladders 2010 are fixedly connected to the bottom of the protective base 1, and the rotating ladder 2011 is rotatably connected to the bottom of the fixed ladder 2010. A torsion spring 2012 is connected between the rotating ladder 2011 and the fixed ladder 2010. A compression wheel 2013 is rotatably connected to the side of the lifting frame 601 near the rotating ladder 2011. The compression wheel 2013 and the rotating ladder 2011 are in compression engagement.

[0050] Initially, the compression wheel 2013 keeps the rotating ladder 2011 compressed, and the torsion spring 2012 is in a torsional state. When the lifting frame 601 rises, it will drive the compression wheel 2013 to move upward. After the compression wheel 2013 and the rotating ladder 2011 separate, the torsion spring 2012 will drive the rotating ladder 2011 to rotate and fold inward. When the lifting frame 601 and the compression wheel 2013 descend, the compression wheel 2013 compresses the rotating ladder 2011 back into a vertical state, and the torsion spring 2012 is torsion.

[0051] The bottom of the bag vacuum cleaner 5 is equipped with a gravity block 7. The gravity block 7 and the lifting frame 601 are pressed together. When the hanging device is folded, the lifting frame 601 rises and contacts the gravity block 7, which pushes the gravity block 7 to move upward and fold the bag vacuum cleaner 5. If the lifting frame 601 descends, the lifting frame 601 will move away from the gravity block 7, and the gravity block 7 will unfold the bag vacuum cleaner 5 due to gravity.

[0052] In summary, after the user climbs the ladder 201, the user's foot-operated lifting frame 104 moves down. Through the cooperation of components such as the rotating plate 105 and transmission parts, firstly, the guardrail 101 can automatically unfold for protection; secondly, the receiving plate 2 can drive the inclined plate 302 to extend and automatically tilt and rotate, so as to guide the wall debris to slide down for collection. In addition, after connecting the external water pipe and the connecting pipe 505, the water can automatically wash the debris on the inclined plate 302.

[0053] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. A foldable hoisting device for construction in confined spaces, comprising a protective base (1) with protective railings (101) on three sides, characterized in that: Two symmetrical guardrails (101) are rotatably connected to the guard seat (1), and another guardrail (101) is slidably connected to the guard seat (1). Hooks (1010) are respectively installed at the four corners of the top of the guard seat (1). A support plate (2) is installed inside the guard seat (1). The support plate (2) and the guard seat (1) are slidably connected. The support plate (2) is driven to extend out of the guard seat (1) by a transmission mechanism.

2. The collapsible construction hoist for use in a small space according to claim 1, wherein It also includes a gear (102), which is fixed on the guardrail (101). The gear (102) meshes with the rack (103), and a rotating plate (105) is rotatably connected to the top of the guardrail (1).

3. The collapsible construction hoist for use in a small space according to claim 2, wherein the plurality of the support members are arranged in a plurality of rows in the vertical direction. A lifting frame (104) is installed on the protective seat (1). The lifting frame (104) and the protective seat (1) are slidably connected. The lifting frame (104) and the rack (103) are fixedly connected. The bottom of the lifting frame (104) is in close contact with the rotating plate (105) on the side away from the guardrail (101). A return spring (106) is connected between the upper part of the lifting frame (104) and the protective seat (1).

4. The collapsible construction hoist for use in a small space according to claim 3, wherein The transmission mechanism includes symmetrically arranged threaded rods (202), which are mounted on the receiving plate (2). The threaded rods (202) and the receiving plate (2) are connected by threads, and the threaded rods (202) and the protective seat (1) are connected by rotation. The threaded rods (202) are fixedly connected to the gear two (203) on the side away from the receiving plate (2). The gear two (203) meshes with the rack two (204), and the rack two (204) is fixedly connected to the guardrail (101) on the side away from the receiving plate (2).

5. The collapsible construction hoist for use in a small space according to claim 4, wherein The top of the protective seat (1) is provided with a sliding frame (205), the sliding frame (205) and the protective seat (1) are slidably connected, the sliding frame (205) is provided with a wedge block (206), the lifting frame (104) is provided with an inclined surface, the inclined surface cooperates with the wedge block (206), and a limiting spring (207) is wound around the sliding frame (205).

6. The collapsible construction hoist for use in a small space according to claim 5, wherein An inclined plate (302) is provided on the top surface of the receiving plate (2) via a shaft. The thickness of the inclined plate (302) is the same as the thickness of the cavity provided on the top surface of the receiving plate (2). The receiving plate (2) has a hollow structure inside and is slidably connected to a movable plate (3). A compression spring (301) is connected between the movable plate (3) and the receiving plate (2). An inclined block (303) is fixedly connected to the top surface of the movable plate (3) at one end away from each other. The inclined block (303) and the inclined plate (302) are pressed together. A discharge port (304) is opened on the side of the receiving plate (2) that is close to each other.

7. The collapsible construction hoist for use in a small space according to claim 6, wherein The bag vacuum cleaner (5) is fixed inside the lower part of the protective seat (1). The bag vacuum cleaner (5) is provided with a connecting shell (501). The top of the connecting shell (501) is fixedly connected to the protective seat (1). The protective seat (1) has a connecting port (502) on the side near the connecting shell (501). The connecting port (502) is connected to the discharge port (304). Dust collection shells (503) are provided on the other three sides of the protective seat (1). The dust collection shells (503) are fixedly connected to the protective seat (1) and are connected to the bag vacuum cleaner (5).

8. The collapsible construction hoist for use in a small space according to claim 7, wherein The inclined plate (302) has a hollow structure inside, and water outlets (504) are opened at equal intervals on the top of the inclined plate (302). The inclined plate (302) is connected to a connecting pipe (505), which is connected to an external water pipe.

9. The collapsible construction hoist for use in a small space according to claim 8, wherein The lower part of the protective seat (1) is provided with a cylinder (6), and the bottom of the telescopic rod of the cylinder (6) is fixedly connected to the lifting frame (601). The lifting frame (601) and the protective seat (1) are slidably connected, and the lifting frame (601) is provided with casters (602).

10. The collapsible construction hoist for use in a small space according to claim 9, wherein The ladder (201) consists of a fixed ladder (2010) and a rotating ladder (2011). The two fixed ladders (2010) are fixedly connected to the bottom of the protective seat (1). The rotating ladder (2011) is rotatably connected to the bottom of the fixed ladder (2010). A torsion spring (2012) is connected between the rotating ladder (2011) and the fixed ladder (2010). The lifting frame (601) is rotatably connected to the side of the rotating ladder (2011). The squeezing wheel (2013) and the rotating ladder (2011) are squeezed together. The bottom of the bag vacuum cleaner (5) is equipped with a gravity block (7). The gravity block (7) and the lifting frame (601) are squeezed together.

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